>>484951ENs are certainly all at least aware of here, but who knows how often they're actually lurking. I'd guess some of them drop by only on occassion and others much more often. Even they're not directly-here it seems very much that they have some people who watch us on their behalf to give them updates.
Moona directly acknowledged 4chan some time ago, rather read a superchat about it I forgot exactly what she commented, but it was along the lines of "yeah, they really like me there" or something like that telling that she is quite aware of us. I'd think many of the IDs use here if they can't read moon well enough for 5ch, which is probably all of them besides Anya (not sure if Iofi has moon runes down) and want to see some kind of candid feedback/reactions/suggestions etc. The way that Ollie acts strikes me 1000% more as some Twitter rando/youtube clipfag - she really doesn't have much of the "us" aura at all and just is more like a loud zoomer enthusiastically parroting shit. Reine seems like she's too stuck-up for here or if she uses it would never admit it or even hint at it.
Anya probably can read 5ch pretty well, but her anime and VN tastes, and overall attitudes look very-very-very /jp/-like honestly so it seems plausible she's maybe been a lurker here.
As for JP holos, they might look at here and be like "oh so this is like the english 5ch huh" but don't speak English remotely well enough to get much out of it. I'd peg Coco as most-likely to check up here since she can actually-read it and has some familiarity with the English web.